Everything is ok with the installation but when I go to set up the usb to serial adaptor it just comes up saying cannot open com port 3. It is there in device manager and saying device working properly.

I have also tried uninstalling version 1545 and reinstalling version 1538 and all works fine. Any advice gratefully received.

Further to the above, I have also found that if I unplug the usb-serial adaptor the error states no devices connected if I try to change the com port in the vismec window. As soon as I plug the adaptor back in it then allows me the option to change the com port to com 3 (the only one available) but then says cannot open com port 3.